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<document id="69E801372CDA1BC1D50E219CA96FB992" ID-CLB-Dataset="21739" ID-DOI="10.37520/aemnp.2020.016" ID-GBIF-Dataset="6f4e1328-0bba-4f1c-aa66-4c1fe1fda040" ID-ISSN="1804-6487" ID-Zenodo-Dep="3879760" ID-ZooBank="45563A23-8582-4C53-81F3-591948E7A74D" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.taxonomicNames_approvedBy="felipe" checkinTime="1591387310617" checkinUser="tatiana" docAuthor="Perkins, Philip D." docDate="2020" docId="060AF5509B2D3706FC5E16D9FEEAFD7D" docLanguage="en" docName="ActaEntMusNatPra.60.1.291-301.pdf" docOrigin="Acta Entomologica Musei Nationalis Pragae 60 (1)" docStyle="DocumentStyle:BA2C5C8540539042E893A65A182CEA85.8:ActaEntMusNatPra.2018-.journal_article" docStyleId="BA2C5C8540539042E893A65A182CEA85" docStyleName="ActaEntMusNatPra.2018-.journal_article" docStyleVersion="8" docTitle="Hydrochus steineri Perkins 2020, sp. nov." docType="treatment" docVersion="6" lastPageNumber="301" masterDocId="FA338D289B24370CFF8B1664FF97FFE8" masterDocTitle="Taxonomy of Guatemalan water beetles in the genus Hydrochus (Coleoptera: Hydrochidae)" masterLastPageNumber="301" masterPageNumber="291" pageNumber="300" updateTime="1698842118860" updateUser="ExternalLinkService" zenodo-license-document="CC-BY-NC-ND-3.0">
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<mods:title id="4A92D9CA140D28449BC94C17C6FB0D96">Taxonomy of Guatemalan water beetles in the genus Hydrochus (Coleoptera: Hydrochidae)</mods:title>
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<mods:namePart id="5400A49CF5E782F1585B540C3810D365">Perkins, Philip D.</mods:namePart>
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<treatment id="060AF5509B2D3706FC5E16D9FEEAFD7D" ID-DOI="http://doi.org/10.5281/zenodo.3883405" ID-GBIF-Taxon="164481676" ID-Zenodo-Dep="3883405" LSID="urn:lsid:plazi:treatment:060AF5509B2D3706FC5E16D9FEEAFD7D" httpUri="http://treatment.plazi.org/id/060AF5509B2D3706FC5E16D9FEEAFD7D" lastPageId="10" lastPageNumber="301" pageId="9" pageNumber="300">
<subSubSection id="C6B917CD9B2D3705FC5E16D9FA94FF3D" box="[981,1283,189,213]" pageId="9" pageNumber="300" type="nomenclature">
<paragraph id="8E1C44469B2D3705FC5E16D9FA94FF3D" blockId="9.[828,1437,189,307]" box="[981,1283,189,213]" pageId="9" pageNumber="300">
<heading id="D554F32A9B2D3705FC5E16D9FA94FF3D" box="[981,1283,189,213]" centered="true" fontSize="10" level="2" pageId="9" pageNumber="300" reason="3">
<emphasis id="BCD798549B2D3705FC5E16D9FA94FF3D" bold="true" box="[981,1283,189,213]" pageId="9" pageNumber="300">
<taxonomicName id="49A33FC59B2D3705FC5E16D9FB31FF3D" ID-CoL="8Y4RK" authority="Perkins, 2020" authorityName="Perkins" authorityYear="2020" box="[981,1190,189,213]" class="Insecta" family="Hydrochidae" genus="Hydrochus" kingdom="Animalia" order="Coleoptera" pageId="9" pageNumber="300" phylum="Arthropoda" rank="species" species="steineri" status="sp. nov.">
<emphasis id="BCD798549B2D3705FC5E16D9FB31FF3D" bold="true" box="[981,1190,189,213]" italics="true" pageId="9" pageNumber="300">Hydrochus steineri</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A7E4252F9B2D3705FB2616DAFA94FF3D" box="[1197,1283,190,213]" pageId="9" pageNumber="300" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
</heading>
</paragraph>
</subSubSection>
<subSubSection id="C6B917CD9B2D3705FBCB16B8FB0FFF07" box="[1088,1176,220,239]" pageId="9" pageNumber="300" type="description">
<paragraph id="8E1C44469B2D3705FBCB16B8FB0FFF07" blockId="9.[828,1437,189,307]" box="[1088,1176,220,239]" pageId="9" pageNumber="300">
(
<figureCitation id="169858C39B2D3705FBCD16B8FBEBFF07" box="[1094,1148,220,239]" captionStart="Fig" captionStartId="1.[150,181,2064,2083]" captionTargetBox="[151,1437,799,2034]" captionTargetId="figure@1.[151,1437,798,2034]" captionTargetPageId="1" captionText="Fig. 1. Dorsal habitus of Guatemalan Hydrochus species." figureDoi="http://doi.org/10.5281/zenodo.3879762" httpUri="https://zenodo.org/record/3879762/files/figure.png" pageId="9" pageNumber="300">Figs 1</figureCitation>
,
<figureCitation id="169858C39B2D3705FB0D16B8FB06FF07" box="[1158,1169,220,239]" captionStart="Fig" captionStartId="8.[151,182,2063,2082]" captionTargetBox="[227,1361,677,2047]" captionTargetId="figure@8.[227,1361,677,2047]" captionTargetPageId="8" captionText="Fig. 7. Hydrochus steineri sp. nov., habitus and male genitalia of holotype." figureDoi="http://doi.org/10.5281/zenodo.3879776" httpUri="https://zenodo.org/record/3879776/files/figure.png" pageId="9" pageNumber="300">7</figureCitation>
)
</paragraph>
</subSubSection>
<subSubSection id="C6B917CD9B2D3705FCB71762FBA0FEDB" pageId="9" pageNumber="300" type="materials_examined">
<paragraph id="8E1C44469B2D3705FCB71762FBA0FEDB" blockId="9.[828,1437,189,307]" pageId="9" pageNumber="300">
<emphasis id="BCD798549B2D3705FCB71762FC2CFEF1" bold="true" box="[828,955,262,281]" pageId="9" pageNumber="300">
<typeStatus id="5118FAE49B2D3705FCB71762FCFFFEF1" box="[828,872,262,281]" pageId="9" pageNumber="300">Type</typeStatus>
material.
</emphasis>
HƟĿƟŦYPൾ:male (
<collectionCode id="E8B2DC839B2D3705FBD91762FB00FEF1" box="[1106,1175,262,281]" country="USA" httpUri="http://grbio.org/cool/142r-0w94" name="Smithsonian Institution, National Museum of Natural History" pageId="9" pageNumber="300" type="Museum">NMNH</collectionCode>
):
<collectingCountry id="F6B404D69B2D3705FB2D1762FAB8FEF1" box="[1190,1327,262,281]" name="Guatemala" pageId="9" pageNumber="300">GUATEMALA</collectingCountry>
:
<collectingRegion id="4C678AA49B2D3705FABE1762FAF2FEF1" box="[1333,1381,262,281]" country="Guatemala" name="Peten" pageId="9" pageNumber="300">Peten</collectingRegion>
,Tikal,
<date id="FA1D62869B2D3705FCB71744FC27FEDB" box="[828,944,288,307]" pageId="9" pageNumber="300" value="1974-06-28">28 June 1974</date>
, W. E. Steinerʼ.
</paragraph>
</subSubSection>
<subSubSection id="C6B917CD9B2D3705FCB71728FB05FDCB" pageId="9" pageNumber="300" type="diagnosis">
<paragraph id="8E1C44469B2D3705FCB71728FB05FDCB" blockId="9.[828,1437,332,1412]" pageId="9" pageNumber="300">
<emphasis id="BCD798549B2D3705FCB71728FBA0FE8B" bold="true" box="[828,1079,332,355]" pageId="9" pageNumber="300">Differential diagnosis.</emphasis>
Among Guatemalan species, recognized by the combination of moderate size (ca.
<quantity id="495BE9A39B2D3705FAE51708FCFEFE4B" metricMagnitude="-3" metricUnit="m" metricValue="3.29" pageId="9" pageNumber="300" unit="mm" value="3.29">3.29 mm</quantity>
), the densely punctate pronotum with deep foveae, the elytra with strial punctures smaller than interstriae, and the male genitalia (
<figureCitation id="169858C39B2D3705FC6B17A8FBB6FE0B" box="[992,1057,460,483]" captionStart="Fig" captionStartId="8.[151,182,2063,2082]" captionTargetBox="[227,1361,677,2047]" captionTargetId="figure@8.[227,1361,677,2047]" captionTargetPageId="8" captionText="Fig. 7. Hydrochus steineri sp. nov., habitus and male genitalia of holotype." figureDoi="http://doi.org/10.5281/zenodo.3879776" httpUri="https://zenodo.org/record/3879776/files/figure.png" pageId="9" pageNumber="300">Fig. 7</figureCitation>
; described below). This species has a generalized
<taxonomicName id="49A33FC59B2D3705FC5B1788FBD3FDEB" authorityName="Leach" authorityYear="1817" box="[976,1092,492,515]" class="Insecta" family="Hydrochidae" genus="Hydrochus" kingdom="Animalia" order="Coleoptera" pageId="9" pageNumber="300" phylum="Arthropoda" rank="genus">
<emphasis id="BCD798549B2D3705FC5B1788FBD3FDEB" box="[976,1092,492,515]" italics="true" pageId="9" pageNumber="300">Hydrochus</emphasis>
</taxonomicName>
habitus; reliable determinations will require dissection of males.
</paragraph>
</subSubSection>
<subSubSection id="C6B917CD9B2D3706FCB71448FF7FFDFD" lastPageId="10" lastPageNumber="301" pageId="9" pageNumber="300" type="description">
<paragraph id="8E1C44469B2D3705FCB71448FAAFFC8B" blockId="9.[828,1437,332,1412]" pageId="9" pageNumber="300">
<emphasis id="BCD798549B2D3705FCB71448FC50FDAB" bold="true" box="[828,967,556,579]" pageId="9" pageNumber="300">Description.</emphasis>
Habitus as in
<figureCitation id="169858C39B2D3705FBD21448FB0EFDAB" box="[1113,1177,556,579]" captionStart="Fig" captionStartId="8.[151,182,2063,2082]" captionTargetBox="[227,1361,677,2047]" captionTargetId="figure@8.[227,1361,677,2047]" captionTargetPageId="8" captionText="Fig. 7. Hydrochus steineri sp. nov., habitus and male genitalia of holotype." figureDoi="http://doi.org/10.5281/zenodo.3879776" httpUri="https://zenodo.org/record/3879776/files/figure.png" pageId="9" pageNumber="300">Fig. 7</figureCitation>
. Size (in mm):
<typeStatus id="5118FAE49B2D3705FABC1448FA0EFDAB" box="[1335,1433,556,579]" pageId="9" pageNumber="300" type="holotype">holotype</typeStatus>
: body (length to elytral apices / width) 3.29 / 1.18; head width 0.80; pronotum length / width 0.73 / 0.78; PA 0.76; PB 0.63; elytra 1.98/1.18. Body size moderate. Dorsum black, with moderately strong iridescence, elytra with non-iridescent black spots. Legs dark brown. Punctation on elytra ca. 24× that of pronotum. Elytra interstriae ca. 1.01.5× strial puncture diameter. Interstria 9
<superScript id="79D6E90E9B2D3705FADB156EFACBFCF0" attach="left" box="[1360,1372,778,792]" fontSize="6" pageId="9" pageNumber="300">th</superScript>
more convex than others, overhanging 10
<superScript id="79D6E90E9B2D3705FB33154EFB53FCD0" attach="left" box="[1208,1220,810,824]" fontSize="6" pageId="9" pageNumber="300">th</superScript>
interstria. Callus on usual area of 5
<superScript id="79D6E90E9B2D3705FC53152EFC73FCB0" attach="left" box="[984,996,842,856]" fontSize="6" pageId="9" pageNumber="300">th</superScript>
interstria large, strongly raised.
</paragraph>
<paragraph id="8E1C44469B2D3705FCD11508FB8CFBEB" blockId="9.[828,1437,332,1412]" pageId="9" pageNumber="300">Pronotum length slightly less than width, widest just behind anterior angles, narrowed at base, sides sinuate, smooth; anterior margin bisinuate; depressions deep, reliefs moderately sharply raised, depressions more densely punctate than reliefs.</paragraph>
<paragraph id="8E1C44469B2D3705FCD11268FA00FB6B" blockId="9.[828,1437,332,1412]" pageId="9" pageNumber="300">
Elytra with spaces between strial punctures ca. 1× their diameter; 4
<superScript id="79D6E90E9B2D3705FC3C124EFC54FBD0" attach="left" box="[951,963,1066,1080]" fontSize="6" pageId="9" pageNumber="300">th</superScript>
interseries raised in area anterior to callus of 5
<superScript id="79D6E90E9B2D3705FCEC122EFCE4FBB0" attach="none" box="[871,883,1098,1112]" fontSize="6" pageId="9" pageNumber="300">th</superScript>
; apices rather sharply conjointly rounded in dorsal view, in lateral view outer margin with weak angulation.
</paragraph>
<paragraph id="8E1C44469B2D3706FCD112E8FE85FE9D" blockId="9.[828,1437,332,1412]" lastBlockId="10.[151,760,190,661]" lastPageId="10" lastPageNumber="301" pageId="9" pageNumber="300">
Male genitalia (
<figureCitation id="169858C39B2D3705FB8D12E8FBDDFB4B" box="[1030,1098,1164,1187]" captionStart="Fig" captionStartId="8.[151,182,2063,2082]" captionTargetBox="[227,1361,677,2047]" captionTargetId="figure@8.[227,1361,677,2047]" captionTargetPageId="8" captionText="Fig. 7. Hydrochus steineri sp. nov., habitus and male genitalia of holotype." figureDoi="http://doi.org/10.5281/zenodo.3879776" httpUri="https://zenodo.org/record/3879776/files/figure.png" pageId="9" pageNumber="300">Fig. 7</figureCitation>
). General characters: paramere tips slightly widened, distal ends pointed, lateral margins arcuate, medial margins of tips emarginate between angulation and distal end, and well separated from lateral margins of aedeagus, distal end of tips extending slightly beyond aedeagus, in lateral view tips narrow, sharply pointed; parameres in lateral view markedly sinuate; parameres with distinct
<emphasis id="BCD798549B2D3705FC191309FC5EFA6C" box="[914,969,1389,1412]" italics="true" pageId="9" pageNumber="300">pwsa</emphasis>
at ca. proximal third; aedeagus moderately narrow in both dorsal/ventral and lateral views,
<emphasis id="BCD798549B2E3706FD0516DBFD2DFF3E" box="[654,698,191,214]" italics="true" pageId="10" pageNumber="301">agw</emphasis>
at ca. mid-length, from which point markedly tapering to sharp distal end, with narrowly sclerotized lateral margins; basal piece much shorter than parameres, slightly wider in lateral than dorsal/ventral views, with rim of orifice moderately sclerotized.
</paragraph>
<caption id="DADC14CE9B2D3705FF1D1E74FC3DF7CB" ID-DOI="http://doi.org/10.5281/zenodo.3879778" ID-Zenodo-Dep="3879778" box="[150,938,2064,2083]" httpUri="https://zenodo.org/record/3879778/files/figure.png" pageId="9" pageNumber="300" startId="9.[150,181,2064,2083]" targetBox="[266,1320,1467,2045]" targetPageId="9">
<paragraph id="8E1C44469B2D3705FF1D1E74FC3DF7CB" blockId="9.[150,938,2064,2083]" box="[150,938,2064,2083]" pageId="9" pageNumber="300">
Fig. 8
<taxonomicName id="49A33FC59B2D3705FF461E74FEBDF7CB" authorityName="Leach" authorityYear="1817" box="[205,298,2064,2083]" class="Insecta" family="Hydrochidae" genus="Hydrochus" kingdom="Animalia" order="Coleoptera" pageId="9" pageNumber="300" phylum="Arthropoda" rank="genus">
<emphasis id="BCD798549B2D3705FF461E74FEBDF7CB" box="[205,298,2064,2083]" italics="true" pageId="9" pageNumber="300">Hydrochus</emphasis>
</taxonomicName>
lectotype labels.A
<taxonomicName id="49A33FC59B2D3705FE691E75FD2FF7CB" authority="Sharp, 1882" authorityName="Sharp" authorityYear="1882" box="[482,696,2064,2083]" class="Insecta" family="Hydrochidae" genus="Hydrochus" kingdom="Animalia" order="Coleoptera" pageId="9" pageNumber="300" phylum="Arthropoda" rank="species" species="obscurus">
<emphasis id="BCD798549B2D3705FE691E75FE6FF7CB" box="[482,504,2065,2083]" italics="true" pageId="9" pageNumber="300">H.</emphasis>
<emphasis id="BCD798549B2D3705FE771E74FDDEF7CB" box="[508,585,2064,2083]" italics="true" pageId="9" pageNumber="300">obscurus</emphasis>
<bibRefCitation id="EA3239B79B2D3705FDC51E74FD2FF7CB" author="SHARP D." box="[590,696,2064,2083]" pageId="9" pageNumber="300" pagination="1 - 144" refId="ref6023" refString="SHARP D. 1882: Insecta. Coleoptera. Vol. 1, part 2 (Haliplidae, Dytiscidae, Gyrinidae, Hydrophilidae, Heteroceridae, Parnidae, Georissidae, Cyathoceridae, Staphylinidae). Pp 1 - 144. In: GODMAN F. D. &amp; SALVIN O.: Biologia Centrali-Americana. Volume 16. Taylor and Francis, London, xv + 824 pp." type="book chapter" year="1882">Sharp, 1882</bibRefCitation>
</taxonomicName>
; B
<taxonomicName id="49A33FC59B2D3705FD6F1E75FC31F7CB" authority="Sharp, 1882" authorityName="Sharp" authorityYear="1882" box="[740,934,2064,2083]" class="Insecta" family="Hydrochidae" genus="Hydrochus" kingdom="Animalia" order="Coleoptera" pageId="9" pageNumber="300" phylum="Arthropoda" rank="species" species="debilis">
<emphasis id="BCD798549B2D3705FD6F1E75FD6DF7CB" box="[740,762,2065,2083]" italics="true" pageId="9" pageNumber="300">H.</emphasis>
<emphasis id="BCD798549B2D3705FD751E74FCA0F7CB" box="[766,823,2064,2083]" italics="true" pageId="9" pageNumber="300">debilis</emphasis>
<bibRefCitation id="EA3239B79B2D3705FCB61E74FC31F7CB" author="SHARP D." box="[829,934,2064,2083]" pageId="9" pageNumber="300" pagination="1 - 144" refId="ref6023" refString="SHARP D. 1882: Insecta. Coleoptera. Vol. 1, part 2 (Haliplidae, Dytiscidae, Gyrinidae, Hydrophilidae, Heteroceridae, Parnidae, Georissidae, Cyathoceridae, Staphylinidae). Pp 1 - 144. In: GODMAN F. D. &amp; SALVIN O.: Biologia Centrali-Americana. Volume 16. Taylor and Francis, London, xv + 824 pp." type="book chapter" year="1882">Sharp, 1882</bibRefCitation>
</taxonomicName>
.
</paragraph>
</caption>
<paragraph id="8E1C44469B2E3706FF3E171AFE9EFE3D" blockId="10.[151,760,190,661]" pageId="10" pageNumber="301">
Dorsal surface:
<emphasis id="BCD798549B2E3706FED7171AFE12FE7D" box="[348,389,382,405]" italics="true" pageId="10" pageNumber="301">adtl</emphasis>
located slightly distal to midlength of aedeagus;
<emphasis id="BCD798549B2E3706FEA617FAFEF8FE5D" box="[301,367,414,437]" italics="true" pageId="10" pageNumber="301">pdmm</emphasis>
narrowly overlapping
<emphasis id="BCD798549B2E3706FDFB17FAFD0FFE5D" box="[624,664,414,437]" italics="true" pageId="10" pageNumber="301">alm</emphasis>
at base;
<emphasis id="BCD798549B2E3706FF1C17DAFF51FE3D" box="[151,198,446,469]" italics="true" pageId="10" pageNumber="301">adbl</emphasis>
large.
</paragraph>
<paragraph id="8E1C44469B2E3706FF3E17BAFF7FFDFD" blockId="10.[151,760,190,661]" pageId="10" pageNumber="301">
Ventral surface:
<emphasis id="BCD798549B2E3706FEE117BBFE3DFE1E" box="[362,426,479,502]" italics="true" pageId="10" pageNumber="301">pvmm</emphasis>
very slightly overlapping
<emphasis id="BCD798549B2E3706FD5B17BAFD6FFE1D" box="[720,760,478,501]" italics="true" pageId="10" pageNumber="301">alm</emphasis>
at base.
</paragraph>
</subSubSection>
<subSubSection id="C6B917CD9B2E3706FF1C147AFEEAFD7D" pageId="10" pageNumber="301" type="etymology">
<paragraph id="8E1C44469B2E3706FF1C147AFEEAFD7D" blockId="10.[151,760,190,661]" pageId="10" pageNumber="301">
<emphasis id="BCD798549B2E3706FF1C147AFE83FDDD" bold="true" box="[151,276,542,565]" pageId="10" pageNumber="301">Etymology.</emphasis>
Named in honor of Warren E. Steiner, longtime friend and colleague, who has collected many new species of Neotropical
<taxonomicName id="49A33FC59B2E3706FEBC143AFE3CFD9D" authorityName="Leach" authorityYear="1817" box="[311,427,606,629]" class="Insecta" family="Hydrochidae" genus="Hydrochus" kingdom="Animalia" order="Coleoptera" pageId="10" pageNumber="301" phylum="Arthropoda" rank="genus">
<emphasis id="BCD798549B2E3706FEBC143AFE3CFD9D" box="[311,427,606,629]" italics="true" pageId="10" pageNumber="301">Hydrochus</emphasis>
</taxonomicName>
, including the only known specimen of this species.
</paragraph>
</subSubSection>
</treatment>
</document>